alternatively the same configuration can be done at runtime via the Felix console under/system/console/configMgr/org.apache.sling.commons.log.LogManager
http://localhost:4504/system/console/configMgr/org.apache.sling.commons.log.LogManager

alternatively the same configuration can be done at runtime via the Felix console under/system/console/configMgr/org.apache.sling.engine.impl.log.RequestLogger
http://localhost:4504/system/console/configMgr/org.apache.sling.engine.impl.log.RequestLogger

Apache Felix Logs: crx-quickstart/launchpad/logs/error.log

You can configure the crx-quickstart/launchpad/logs/error.log path in crx-quickstart/launchpad/sling.properties file under the property: